title: Nutrient sources and composition of recent algal blooms and eutrophication in the northern Jiulong River, Southeast China.
abstract: The natural process of eutrophication is accelerated by human activities worldwide that interrupt nutrient biogeochemical cycles. Three algal bloom events have been monitored in the northern tributary of the Jiulong River since 2009. The inflection points in a robust locally-weighted regression analysis (LOESS) of the relationship between TN and TP concentrations in the river water, and a TN:TP comparison with nutrient source loadings, suggested that both external loading and internal nutrient cycling contributed to these algal blooms. Nutrient release from the sediments may have played an important role in regulating the nutrients in the overlying water column. In particular, excessive nutrient inputs from various sources and ubiquitous river damming caused further accumulation of the nutrient loading. In-situ autochthonous primary production was enhanced in this relatively stable "river" to "lake" water body. Thus, attention must be paid to the effects of river damming and the consequent internal nutrient release.
authors.affiliation: State Key Laboratory of Marine Environmental Science, Environmental Science Research Centre, Xiamen University, Xiamen 361005, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Li
authors.forename: Wenzhi
authors.initials: W
authors.lastname: Cao
authors.forename: Caixia
authors.initials: C
authors.lastname: Su
authors.forename: Huasheng
authors.initials: H
authors.lastname: Hong
mesh_terms: D000641:Ammonia / Q000032:analysis; D002681:China; D004784:Environmental Monitoring; D005068:Eutrophication; D058086:Microalgae / Q000254:growth & development*; D009566:Nitrates / Q000032:analysis; D009584:Nitrogen / Q000032:analysis; D058458:Nitrogen Cycle; D010758:Phosphorus / Q000032:analysis; D045483:Rivers / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data
chemical_list: D009566:Nitrates; D014874:Water Pollutants, Chemical; D010758:Phosphorus; D000641:Ammonia; D009584:Nitrogen